Taking a break from promoting her new romantic comedy, Ghosts of Girlfriends Past, Jennifer Garner got herself reacquainted with Broadway by having a low-key family outing at The Little Mermaid on April 28. Leaving her newborn daughter, Seraphina (almost four months old) and husband Ben Affleck in good hands, Garner made it a girls’ night out with her four-year-old daughter Violet, even heading backstage after the show to sign the Mermaid guest board and pose with stars Sierra Boggess and Norm Lewis. Garner, as you know, made her Broadway debut in the in the 2007 production of Cyrano de Bergerac. Here’s hoping she’ll be back on the Great Whit